Malicious PDF — malware analysis report

Static analysis result for SHA-256 619686fe339bd342…

MALICIOUS

PDF

74.9 KB Created: 2020-11-10 18:54:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b8b3cf0ae037dca8c6b548447a894944 SHA-1: 01c1a2e1f0d60197529eb418b2228a5c47d16d0d SHA-256: 619686fe339bd342570312fb2f4a67945860ee03e1469da22fc7b4e7cad145ee
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. One of the primary external URIs points to 'traffnew.ru', which is suspicious. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate an attempt to redirect users to potentially malicious or deceptive content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffnew.ru/123?keyword=directions+to+chino+airport PDF link annotation
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/7305094.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376087/normal_5f94803ccd2ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368735/normal_5fa358e923f57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_5f92826213459.pdfIn PDF document text
    • https://jujepuwajepoxox.weebly.com/uploads/1/3/4/4/134466337/4668828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374984/normal_5fa795fcb9efa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9204cd5b-ee2e-40ad-99bb-9ce9c4c69b91/marepawaxunawa.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/sieve_analysis_test_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/donvier_manual_ice_cream_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92e6152f-ad61-4f47-a2f7-098265346ad0/lixatujoboka.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA0 4132 bytes
SHA-256: 014a40bcfb800c0adb66420edbbf834186e983122fdc462f7cc4f09eefbf4375
font_01_sfnt_off0000cb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB16 4988 bytes
SHA-256: 61ee1480c1e0c4d301aee16605e0fc660117aa4c750f298d6b094ee2dce457fb
font_02_sfnt_off0000dc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0C 12852 bytes
SHA-256: 1469afb319257283bdd5e62fd757e75dcdcaf13ff4aca5b9fb6dd0ae2370706a
font_03_sfnt_off00010598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10598 17184 bytes
SHA-256: 3f03aab645de7658804f8912ecde8f5163b81a0cf005287d84ee51f2c19e0bb1

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